Each Ballet Cold Storage has a primary coin address as well as multicurrency support. You do not need to use the Ballet Crypto app to deposit coins to the primary coin address. Just use the cryptocurrency wallet app you want to send coins from to scan the primary coin address QR code on your Ballet Cold Storage card. But you do need to use the Ballet Crypto app to deposit other cryptocurrencies to your Ballet Cold Storage.
Do I need to use the Ballet Crypto mobile app to deposit cryptocurrency to my Ballet Cold Storage card??
Ballet Support